摘要
作者运用ETM遥感数据,对智利北部的丘基卡马塔、布兰卡、科亚瓦西及埃斯康迪达等世界级超大型斑岩铜矿床进行了信息处理,经过对矿床地质特征和遥感特征分析,选择了1、4、5、7波段进行K-L变换,取其第三或第四主成分来获取富含羟基矿物的"羟基图像"。结果发现羟基异常与丘基卡马塔矿床、埃斯康迪达矿床吻合较好,与布兰卡矿床、科亚瓦西矿床也有对应的吻合关系。作者分析了其中的原因,并指出羟基异常是寻找斑岩型铜矿床的重要标志,其成果对寻找大型超大型斑岩铜矿床具有指导意义。
The authors deal with the ETM remote sensing data obtained from several large porphyry copper deposits such as Chu- quicamata, Quebrada Blanca, Collaguasi and La Escondida. Wave bands 1, 4, 5 and 7 are used to do K-L transformation, from them the third or fourth principal components are chosen to signal hydroxyl-bearing minerals. The results show that the hydroxide exception at Chuquicamata and La Escondida deposits accurately corresponds with the mineralization. Similar scenarios can be also observed at the Blanca and Collaguasi deposits. The authors propose that the hydroxide exception is useful to target porphyry copper deposits.
出处
《矿产勘查》
2012年第4期549-557,共9页
Mineral Exploration
关键词
遥感技术
智利
斑岩铜矿
找矿标志
remote sensing
porphyry copper deposit
Chile
prospecting criteria
